Links of the day

Links of the day

1. Are Twin Studies “Pretty Much Useless”? A defense of the value of using twin studies to scientifically examine the effects of heredity and environment. Here is another good defense of twin studies.

2. Limits to growth. We have grown used to continuous economic growth. But such growth cannot continue forever. No matter how much we innovate, the physical laws of the universe impose limits on how much the economy can grow.

3. Juno looks back, photographs earth-moon system A photograph of the earth and the moon taken from 6 million miles away by the Juno spacecraft. It shows how small our planet really is. Here is a similar image from the Mar Express probe from 2003.

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